. Artex ELT-200 series

. Pointer model ELT 3000-series

If this is a new installation or if the current installation is unacceptable, find a location per the following: 
. RTCA suggests the aft section of the fuselage. Statistically, this is the least likely section of the aircraft to receive damage in a crash. It is also near the antenna connection, minimizing cable length between the transmitter and antenna.  

. Maintain access for maintenance. 

. If possible, avoid locating the ELT where it will be subjected to chemical fluids such as deicing compounds, cleaning fluids, etc. Over time, these chemicals may attack the plastic and metal components.

The mounting location must conform to the requirements of RTCA DO-204 and AC 43.13. DO-204, Section 3.1.8 states:
“The ELT shall be mounted to primary aircraft load carrying structures such as trusses, bulkheads, longerons, spars, or floor beams (not aircraft skin). The mounts shall have a maximum static local deflection no greater than 2.5 mm (0.1 in.) when a force of 450 Newtons (100 lbs) is applied to the mount in the most flexible direction. Deflection measurements shall be made with reference to another part of the airframe not less than 0.3 meters (1 foot) nor more than 1.0 m (three feet) from the mounting location.”
Mount the ELT horizontally so that the longitudinal axes of the ELT and aircraft are aligned within 10o.
Using the template provided, mark and drill four mounting holes using a #19 (0.1660”/metric 4.2mm) drill bit.  Install the mounting tray.  Artex suggests using the outermost mounting hole-pattern on the template for minimum flexure of the mounting tray. Use the 8-32 X 5/8” Phillips, pan-head screws, nuts and flat washers provided. 
Also refer to paragraph 2.10 (page 30) for helicopter installations.
 
 

 
Figure 4 - Mounting Hole Diagram for Artex 110 Series and Narco ELT
 
NOTE:  DRAWING IS NOT TO SCALE.
 DO NOT USE AS A TEMPLATE FOR DRILLING HOLES.
Metric Dimensions 50.8mm X 139.5mm
 

 
Figure 5 - Mounting Hole Diagram for Artex 200 Series
 
NOTE:  DRAWING IS NOT TO SCALE.
 DO NOT USE AS A TEMPLATE FOR DRILLING HOLES
Metric Dimensions 46.4mm X 74.8mm
 
 

 
Figure 6 - Mounting Hole Diagram for Pointer
 
NOTE:  DRAWING IS NOT TO SCALE.
 DO NOT USE AS A TEMPLATE FOR DRILLING HOLES
Metric Dimensions 64.7mm X 108.2mm
 
 
2.4 Mount Antenna 

The ELT antenna must be mounted in accordance with the requirements of RTCA/DO-204, Section 3.1.10 and RTCA/DO-183 Section 3.1.10. Locate the antenna at least 30 inches (75 cm) away from other antennas, wires, vertical stabilizer, etc. to minimize distortion of the radiated field and interference with other equipment. The antenna must be installed VERTICALLY (within ±15o of the vertical plane is acceptable). Artex has no performance data for installations that deviate from the stated requirements.
　
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